tea cup ray is just a name that is given to small rays that wholesalers dont know the spiecies of is when they get them in... so they call them tea cups... they are normally cheap in price $40-$80 and are normally reticiculated rays (retic) they normally have a max size of 18" but they make up for thier smaller size with larger tails... to me... ur better off with a motoro because they are alot hardier and easier to feed. Personally reticulated rays arnt as cool as motoros cuz motoros have spots where retics are just kinda plain... hope i helped